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https://issues.apache.org/jira/browse/CALCITE-1515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16804165#comment-16804165
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Julian Hyde commented on CALCITE-1515:
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[~Chunwei Lei], I did some fix-up (removing the redundant 'inputCount' argument
to CURSOR, and allowing a table function to be called with zero inputs). Please
take a look at
https://github.com/julianhyde/calcite/commit/bd116f45fb9438293a55260717500391bf977197;
if you +1 I will squash and commit.
> Support TableFunctionScan in RelBuilder
> ---------------------------------------
>
> Key: CALCITE-1515
> URL: https://issues.apache.org/jira/browse/CALCITE-1515
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.10.0
> Reporter: Anton Mushin
> Assignee: Chunwei Lei
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 4.5h
> Remaining Estimate: 0h
>
> Calcite has a TableFunctionScan, which is a RelNode, takes a function, 0 or
> more RelNode inputs, and 0 or more other arguments.
> RelBuilder does not support TableFunctionScan yet.
> add In RelBuilder TableFunctionScanFactory which will create
> LogicalTableFunctionScan like as for LogicalTableScan and factory for others
> RelNodes [
> [example|https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/tools/RelBuilder.java#L125]
> ]
> also adding a functionScan method, analogous to the scan method but for table
> functions.
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